1. (1) A. Tanaka, S. Torii, and D. Ebihara et al.: “Proposal and Design of Multi-Degree-of-Freedom Spherical Actuator”, 11th Conference of Electromagnetic Phenomena and Dynamics, PS2-3, pp. 169-172 (2002) (in Japanese)
2. 田中飛鳥·鳥居 粛·海老原大樹,他: 「他自由度球体アクチュエータの提案と設計」, 第11回MAGDAコンファレンス, PS2-3, pp. 169-172 (2004)
3. New Actuators. Actuators with Multi-Degree-of-Freedom.
4. (3) Y. Kawase, T. Yamaguchi, H. Naito, M. Tanaka, K. Hirata, and Y. Hasegawa: “3D FEM coupled with the rotation and linear motion equations”, The Papers of Joint Technical Meeting on Static Apparatus and Rotating Machinery, IEE Japan, SA-04-24/RM-04-24, pp. 63-66 (2004) (in Japanese)